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Home > Industrial Equipment & Components > Valve > Gate Valve > GB/T Marine Gate Valve DN50 DN150 PN1.6-6.4MPa Flanged Steam System

GB/T Marine Gate Valve DN50 DN150 PN1.6-6.4MPa Flanged Steam System

GB/T Marine Gate Valve DN50 DN150 PN1.6-6.4MPa Flanged Steam System thumbnail-3

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GB/T Marine Gate Valve DN50 DN150 PN1.6-6.4MPa Flanged Steam System thumbnail-5

GB/T Marine Gate Valve DN50 DN150 PN1.6-6.4MPa Flanged Steam System photo-1

GB/T Marine Gate Valve DN50 DN150 PN1.6-6.4MPa Flanged Steam System photo-2

GB/T Marine Gate Valve DN50 DN150 PN1.6-6.4MPa Flanged Steam System photo-3

GB/T Marine Gate Valve DN50 DN150 PN1.6-6.4MPa Flanged Steam System photo-4

GB/T Marine Gate Valve DN50 DN150 PN1.6-6.4MPa Flanged Steam System photo-5

Product Spotlights

GB/T standard marine gate valve for steam systems. Features DN50-DN150 sizes, PN1.6-6.4MPa pressure rating, and flanged connection. Constructed with durable materials like cast steel or stainless steel for corrosion resistance. Offers full-bore design, tight sealing, and optional gear/electric actuation. Suitable for demanding marine environments, ensuring reliable flow control and safety.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Product Standard:

GB/T

Nominal Diameter (DN):

50, 65, 80, 100, 125, 150

Pressure Rating (PN):

1.6 MPa, 2.5 MPa, 4.0 MPa, 6.4 MPa

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Product Standard GB/T

Nominal Diameter (DN) 50, 65, 80, 100, 125, 150

Pressure Rating (PN) 1.6 MPa, 2.5 MPa, 4.0 MPa, 6.4 MPa

Connection Type Flanged (RF)

Application System Steam System

Body Material Cast Steel, Ductile Iron, Stainless Steel

Seat Material Stainless Steel, Hard Alloy

Stem Material Stainless Steel

Operation Type Handwheel, Gearbox, Electric Actuator

Design Standard GB/T 12234, Marine Standards

As a professional valve manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our high-performance Marine Gate Valve series, engineered specifically for demanding steam systems onboard vessels and in marine infrastructure. With an established track record since 2016 and exports reaching major global markets, we understand the critical need for reliability, safety, and durability in marine applications. Our GB/T standard gate valves are designed to provide a tight seal, robust construction, and smooth operation, ensuring uninterrupted flow control for steam lines under high pressure and temperature conditions. This product represents our commitment to delivering industrial-grade solutions that meet the stringent requirements of the maritime industry.

Key Product Features and Technical Advantages:

Rugged Construction for Marine Environments: Manufactured from premium-grade materials such as cast steel (WCB, WCC), ductile iron, or stainless steel (CF8, CF8M), the valve body is built to withstand corrosive seawater atmospheres, high humidity, and thermal stresses inherent in steam systems. The stem is typically made of stainless steel (2Cr13 or equivalent) for excellent corrosion resistance and mechanical strength.
Superior Sealing Performance: Features a flexible wedge or parallel slide wedge design that ensures a bubble-tight seal when closed, preventing steam leakage. The sealing surfaces are often hard-faced with Stellite or other hard alloys, or utilize resilient materials, offering excellent wear resistance and a long service life even with frequent operation.
Full-Bore Design for Minimal Pressure Drop: The valve provides a full, unobstructed flow path when fully open, minimizing pressure loss across the valve. This is crucial for maintaining system efficiency in steam distribution networks, helping to conserve energy and reduce operational costs.
Versatile Pressure and Temperature Ratings: Designed to handle a wide range of operating conditions. The PN1.6 to PN6.4 MPa pressure rating covers most low to medium-pressure steam applications, while the design accommodates temperatures suitable for saturated and superheated steam services.
Multiple Actuation Options: Available with standard handwheel operation for manual control. For larger sizes or remote operation, gear operators or electric/pneumatic actuators can be supplied, facilitating integration into automated shipboard control systems.
Strict Compliance with Standards: Manufactured in accordance with GB/T 12234 (and other relevant national standards) and designed to meet common marine classification society requirements for materials, design, and testing. This ensures compatibility and reliability in global maritime projects.

Technical Specifications Table:

Parameter	Specification / Option
Product Design Standard	GB/T 12234, Marine Application Design
Nominal Diameter (DN)	50, 65, 80, 100, 125, 150 mm
Pressure Rating (PN)	1.6, 2.5, 4.0, 6.4 MPa (Class 150, 300, 400, 600 equivalent)
Connection Type	Flanged, Raised Face (RF), dimensions per GB/T, ANSI, or JIS standards
Typical Body Material	WCB (Cast Carbon Steel), Ductile Iron, CF8 (304 SS), CF8M (316 SS)
Seat & Wedge Material	13%Cr Stainless Steel + Stellite hardfacing, All Stainless Steel, Resilient Seated
Stem Material	Stainless Steel (2Cr13, 304, 316)
Packing Material	Graphite, PTFE, Flexible Graphite for high-temp steam
Operation Mode	Handwheel (Standard), Gear Operator, Electric/Pneumatic Actuator (Optional)
Applicable Medium	Steam, Water, Oil, Non-corrosive Fluids
Test & Inspection	Shell Test, Seat Test, Hydrostatic & Pneumatic tests per standard

Benefits for Your Marine Operations:

Enhanced System Safety: Reliable shut-off capability prevents steam leaks, protecting personnel and equipment.
Reduced Maintenance Downtime: Durable materials and robust design lead to longer maintenance intervals and lower lifecycle costs.
Operational Flexibility: The full-bore design and smooth operation allow for efficient flow control and system adjustments.
Global Supply Chain Support: With shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing, we ensure timely delivery to your project sites worldwide.

Backed by our ISO9001 certification and nearly a decade of manufacturing expertise since 2016, Shanghai Zhibang Valve delivers products that combine quality craftsmanship with practical design. Our annual export value of US$1-1.5 million and presence in markets across North and South America, Europe, Asia, Africa, and Oceania testify to the global acceptance of our valves. We are confident that our Marine Gate Valves offer a dependable and cost-effective solution for your steam system requirements. For detailed quotations, technical drawings, or to discuss custom specifications, please contact our sales team. Let us be your trusted partner for marine valve solutions.

Frequently Asked Questions (FAQ):

Q: Are these gate valves suitable for saturated steam and superheated steam?
A: Yes, they are designed for steam service. The specific material selection (body, seat, packing) will be recommended based on the actual steam temperature and pressure to ensure safe and reliable operation.
Q: Can you provide valves with specific flange standards like ANSI or JIS?
A: Absolutely. While we manufacture to GB/T standards by default, we can produce valves with flange dimensions and drilling to match ANSI, JIS, DIN, or other international standards upon request to suit your piping system.
Q: What is the typical lead time for an order of DN100 valves?
A: Lead time varies based on material, pressure rating, and order quantity. For standard carbon steel (WCB) valves in common sizes, production typically takes 4-6 weeks. We provide accurate lead times with every quotation.
Q: Do you offer any surface treatment for improved corrosion resistance?
A: Yes. Standard finishes include painting. For enhanced marine corrosion protection, options like epoxy coating, galvanizing, or other specialized coatings are available. Please specify your environmental requirements.
Q: Is the valve design suitable for frequent operation?
A: Gate valves are generally recommended for isolation (fully open or closed) rather than frequent throttling. However, our design with anti-galling stem threads and durable sealing surfaces ensures good performance for regular operational cycles common in marine systems.
Q: What documentation is provided with the valves?
A: Standard documentation includes a Material Test Certificate (MTC), product manual, and packing list. Additional certificates like inspection reports or third-party certification documents can be arranged.
Q: Can electric actuators be fitted at your factory?
A: Yes, we offer comprehensive actuation solutions. We can source, mount, and test electric or pneumatic actuators from reputable brands to provide you with a ready-to-install automated valve package.
Q: How do you ensure quality control during manufacturing?
A: Our ISO9001 system governs the entire process, from raw material inspection to final testing. Each valve undergoes rigorous pressure tests (shell and seat) and dimensional checks before shipment.